There were recommendations in another active thread about how to deal with ammonia upon opening. I didn't want to hijack the thread, so I'll start a new one. The recommendation was as follows:
Treatment for Ammonia:
1. Begin a SLAM and dose FC up to SLAM level. Do not add additional CYA at this point.
2. Retest FC at 10-minute intervals.
a. If FC loss is greater than 50%, add FC to bring back up to SLAM level and continue retesting FC @ 10-minute intervals.
b. IF FC loss is 50% or less, add FC to bring back up to SLAM level. Go to Step 3.
3. If CYA is below 30 ppm, add enough CYA to bring level up to 30 ppm.
4. Continue SLAM as directed in the SLAM article until the SLAM Criteria of Done are met. Test as directed in the SLAM article - no longer need to test FC at 10 minute increments at this point.
My question is, if the water has 0 FC & no measurable CYA, what is the recommended FC level referred to in step 1? The CYA/FC chart only goes down to 20....should the CYA be added to bring the level to at least 20 and SLAM from there?